Plot:Wikipedia quote for you (I am somehow unable to formulate a sentence atm)

Spoiler:

On Christmas Eve, 2029, the unidentified "Apocalypse Virus" spreads and plunges Japan into a state of emergency in a chaos known as the "Lost Christmas" incident. An international organization known as the GHQ intervenes with martial law and restores order to Japan at the cost of its independence.Ten years later in 2039, Shu Ouma, a 17-year-old high school student who keeps to himself in school, meets Inori Yuzuriha, the lead singer of Egoist, while visiting one of his favorite places on before heading home from school. Shu is a big fan of Inori, the singer who has taken the Internet world by storm. However, he also discovers the other side of her: she is a member of the "Undertakers," a resistance group that aims to liberate Japan from the GHQ. Shu starts taking part in the actions of "Undertaker-(funeral parlor)" and the "King's Mark" appears on his right hand after the Void Genome in his pocket was shot by a GHQ Endlave. This "mark" bestows him the power to reach inside another person's heart to extract and materialize a weapon or item from it. The anime tells the story of Shu's reluctant involvement with the Undertakers and the hardship involving the battles they fight and the lost truth of Shu's past.

My view: I somewhat downloaded this anime without any expectations but I was extremely surprised (How is it it possible that I missed such a good mecha[eventhough mechs are secondary]? :O), first by animation which was just perfect, second by OST, then by characters and after that by story, which really got me (not a single eye will remain dry) eventhough start is a bit cliché, the story really evolves (as the main character). And the thing I liked about it was that it kinda reminded me of Mai-Hime with basicaly everything - style of characters, story evolution and some details which some might not notice. Eventualy I pictured it as if Mai-Hime and Code Geass had a baby, that this would be it...then I checked Hiroyuki Yoshino and everything became clear to me :DAnyway I think it is like Mai-Hime in many ways [but trying to explain why I think that is probably beyond my actual capabilities (I will probably EDIT this later)] and you should atleast give it a shot (although you may find it a bit sadder than Mai-Hime).